Drill-grinding machine.



No. 827,459. I PATENTED JULY 31, 1906. R. .L. MORGAN & J. N. HEALD.

DRILL GRINDING MACHINE.

APPLICATION FILED SEPTA, 19-05.

i v I lnuevi cow s Witnesses v Ralph L. Movgcun. R 9' v clamesN. 01d.

t com'iey UNITED STATES,

PATENT. oFFIoE.

RALPH L. MORGAN AND JAMES N. HEALD, OF WORCESTER, MASSACHU- SETTS, ASSIGNORS TO. THE HEALD MACHINE COMPANY, OF WORCES- TER, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

onlLL-nmome MACHINE.-

V Specification of flletters Patent. Applloation'filed Septembor 87, 1.906- Serial No. 280.328.

Patented July 31, 1906.

To all whom it may concern.-

Be it known that we, RALPH L. Monean' and JAMES N. HEALD, citizens of the United States, residing at-Worcester, in the county of Worcester and Commonwealth ofMassachusetts, have invented a new and useful -Im rovement in Drill-Grinding Machines, of

which the following is a specification, accompanied by drawings forming a part of the.

same, in which-- Figure 1 represents a side elevation of a ortion of a drill-grinding machine embodymg our invention, part1 shown insection. Fig. 2 is a front view the grinding-wheel and inclosing hood, and Fig. 3 is a detached sectional view of the hood 19'.'

Similar reference-figures refer to, similar parts in the different views.

Our invention has for its objectto provide means for supplying water to the abradingwheel of a grinding-machine, and in the ing Water-receptacle.

present drawings and specification we have shown and described our invention as applied to the grindin wheel of a twist-drill grinder.

We accomp ish the object of our invention by providing-a revolving cup-shaped Waterreceptacle concentric 'Wlth the axis of the grinding-wheel, said cup-shaped Water-re ceptacle having at its e g e an inturned lip. forming an annular recess in which a nantity of water placed in the rece tac e is thrown by. centrifugal force cause by,-the rapid revolution of. the water receptacle causing the water to lie in a thin sheet around the inner side of the periphery of the revolv- Interposed in the path of the'revolving sheet of water is a flattened receiving-nozzle which communicates with, a pipe leading to the grinding-surface of the wheel, upon which a stream of water is delivered, whicli,'iii leaving the grindin -wheel either by gravity or by centrifugal or'ce is again caught within the revolving water-receptacle and thrown outward by centrifugal force into an annular sheet to be again caught by the flattened receiving-nozzle.

Referring to the accompanying drawings, 1 denotes a post upon which the operative parts of the grinding-machine are mounted.

2 denotes a rotating hollow spindle ournaled in bearings 3 and 4, rotating around the fixed spindle 2 and driven from any con- Venient counter-shaft through a belt connection with a (pulley 5, carried by the rotating hollow spln le 2. Suitably attached to the rotating spindle 'is a collet 6, carrying a grinding-wheel 7 which, in the present inof the receptacle is thrown against that portion of the inner wall of the receptacle having thereatest diameter, causing the water to revo ve in an annular sheet, as indicated by the broken lines 13, Fig. 1. Into the path of presented to the side of the this revolving sheet of water 13 we place the end of a pipe. 14, having a flattened receivingnozzle 15, with a space 16 between the end of the nozzle and the inner wall'of the waterreceptacle. The cup-shaped receptacle 10 is rotated in the direction of the arrow 17, Fig.

2, carrying the water 13 against the open end of the receiving-nozzle 15, which is forced through the pipe 14 and allowed to fall by gravity through the communicating pipe 18 upon the side of the ginding-wheel 7.

Su ported upon theend of the fixed spin le 2 is a hood 19, having a li 20'overhanging the periphery of the grin ing-wheel in position to catch any water thrown from the Wheelby centrifugal force and deliver the same to the cup-shaed water-receptacle- 10.' By leaving a sma space between the inner wall of the revolving cup-shaped waterreceptacle 10 and theopen end of the receiving-nozzle 15 we avoid feeding through the 'ipes 14 and 18 any grit-or dirt which may ave become lodged in the water from'the inding-wheel, as the particles of grit and irt being heavier than the water are carried by centrifu al force against the inner wall of the cupaped-receptacle and beyond the open end of the receiving-nozzle 15.

The collet 6, carrying the grinding-wheel 7, is attached to a sleeve 21, inclosing the spin dle 2 and entering the hollow spindle 2, with I which it has a screw-threaded connection 22.

The collet 6 is provided with a hub 23,overlapping the hollow spindle 2 and carrying a screw 24, placed obliquely to the axis of the grinding-wheel. The screw 24 has a beveled tip 25, which bears against a clampinglate 26, resting against the outer surface 0 the hollow spindle 2, a recess 27 being formed in the hub 23 to allow the plate 26 to be inserted. By advancing the screw 24 its beveled tip 25 will be crowded a ainst the plate 26, thereby clamping the hu 23 to the hollow spindle 2 and securin the rotation of the collet 6 and Wheel 7. y slightly withdrawing the screw 24 the plate 26 will be loosened, allowing the collet 6to be rotated, while the spindle 2 is held stationary. The rotation of t escrew-threaded sleeve 21 within the screwthreaded hollow spindle 2 will effect an adj ustment of the grinding-wheelon the spining-wheel, and a pipe provided at one end dle 2, causing the side 8 of the wheel to be moved toward or away from the delivery end of the pipe 18 when the screw 24 is advanced and the grinding-wheel tightened in position.

What we claim as our invention, and desire to secure by Letters Patent, is

1 Ina grindin -machine, the combination with a grinding-w eel, of a concentric revolvving water-receptacle having its interior diameter greater than the diameter of said grind- With a receiving end held contiguous to the inner annular surface of said water-receptacle, and having its opposite end arranged to .deliver Water. to the grinding-surface of said wheel.

2. In a grinding-machine, the combination with a revolving grinding-wheel, of a revolving water-receptacle, concentric with said wheel, means for conducting the water thrown from said grindin -wheel by centrifugal force into said receptacI a receiving end held contiguous to the inner annular surface of said water-receptacle.

3. In a grinding-machine, the combination with a revolving grinding-wheel, of a concentric revolving water-receptacle having its die, and a water-pipe. having ameter greater than the diameter of said grinding-Wheel, a hood parallel with one side of the grinding-wheel, and having a lip overhanging the periphery of the grinding-wheel and entering within the edge of said'waterreceptacle, and means for conducting water from said water-receptacle to the grindingsurface of said grinding-wheel.

4. In a grinding-machine, the combination with a revolving grinding-wheel, of a concentric revolving water-receptacle inclosing the periphery of said grindin -wheel, a-fixed hood parallel with the side 0% the grinding-wheel and having a lip entering the edge of said water-receptacle, a water-pipe held by said hood with one end arranged to-receive water-from the inner periphery of said water-receptacle, and its opposite end arranged to deliver water to the grinding-wheel.

5. In a grinding-machine, the combination with a revolving grinding-wheel, of a concentric revolving water-receptacle, a fixed waterpipe arranged to receive water at one end from the inner annular surface of said waterreceptacle and deliver it at the opposite end to the rinding-wheel, and means for adjusting said livery end of said wateripe.

6. In a grinding-machine, the combination with a supporting framework, of a fixed spindle held therein, a sleeve rotatable on said spindle, a concentric water-receptacle carried by said sleeve, a grinding-wheel carried by said sleeve, means for the adjustment of said grinding-Wheellongitudinally on said sleeve and relatively to said water-receptacle, and means for conducting water from said waterreceptacle to said grindin -wheel.

Dated this 23d day of eptember, 1905.

RALPH L. MORGAN. JAMES N. HEALD.

' Witnesses:

PENELOPE CoMBERBAon, RUFUS B. FOWLER.

grinding-wheel relatively to the de- 

